CN220884690U

CN220884690U - Motorcycle clutch assembly

Info

Publication number: CN220884690U
Application number: CN202322603650.2U
Authority: CN
Inventors: 王卫东; 曾右华; 张海林; 万讯
Original assignee: Chongqing Haosen Motorcycle Co ltd
Current assignee: Chongqing Haosen Motorcycle Co ltd
Priority date: 2023-09-25
Filing date: 2023-09-25
Publication date: 2024-05-03
Anticipated expiration: 2033-09-25

Abstract

The utility model discloses a motorcycle clutch assembly, which comprises a primary clutch transmission mechanism and a secondary clutch transmission mechanism which are arranged up and down, wherein the secondary clutch transmission mechanism comprises a second front-stage driving gear sleeved at the lower end of a crankshaft of a motorcycle engine and meshed with the primary clutch transmission mechanism, and a second rear-stage driven hub component and a second rear-stage driving hub component which are sleeved at the lower end of a main shaft of the motorcycle and arranged up and down, the second rear-stage driving hub component is meshed with the second front-stage driving gear, and the second rear-stage driven hub component is fixed with a main shaft of the motorcycle; the first-stage clutch transmission mechanism comprises an automatic wet clutch sleeved at the upper end of a crankshaft of the motorcycle engine and a first rear-stage driven gear in transmission connection with the automatic wet clutch.

Description

Motorcycle clutch assembly

Technical Field

The utility model relates to the field of motorcycle clutches, in particular to a motorcycle clutch assembly.

Background

As shown in fig. 1, the currently adopted motorcycle clutch assembly mainly comprises a primary clutch and a secondary clutch, wherein a first front-stage driving disc and a first front-stage driving gear of the primary clutch are sleeved at the upper part of a crankshaft of a motorcycle engine, the first front-stage driving disc is arranged in a shell of the first front-stage driving gear, a spline sleeve at the center of the first front-stage driving disc is meshed with the crankshaft, a shoe block is arranged on the first front-stage driving disc, a first rear-stage driven gear is sleeved at the upper part of a main shaft of the motorcycle, and a spline sleeve at the middle part of the first front-stage driving disc is meshed with the main shaft; the second front stage driving gear of the secondary clutch is sleeved at the lower part of the crankshaft of the motorcycle engine and meshed with the crankshaft, the second rear stage driving hub component and the second rear stage driven hub component are arranged up and down and sleeved at the lower part of the main shaft of the motorcycle, the second rear stage driving hub component is meshed with the second front stage driving gear, and the second rear stage driven hub component is fixed with the main shaft. The motorcycle clutch assembly is composed of two stages of clutch, wherein the front stage of each stage is arranged on a crankshaft of a motorcycle engine, and the rear stage of each stage is arranged on a main shaft of the motorcycle. When the rotating speed of the crankshaft reaches a certain value, the hoofs on the first front-stage driving disc are thrown outwards under the action of centrifugal force and are contacted with the shell on the first front-stage driving gear, so that friction transmission is realized, and the first rear-stage driven gear transmits the main shaft of the motorcycle. When the rotating speed reaches a certain speed, the steel balls in the chute at the upper part of the second front stage driving gear roll along the chute under the action of centrifugal force, so that friction transmission is realized with the second rear stage driven hub part above, and the second rear stage driven hub part rotates to drive the main shaft of the motorcycle.

The clutch assembly is driven by primary clutch, the clutch is a shoe clutch, the friction driving force of the clutch is limited, the outer cover and the clutch shoe are easy to generate relative friction high-temperature ablation, the engine lubricating oil is rapidly heated up, deteriorated and accelerated, the abrasion of parts is reduced, the service life of the engine is prolonged, and the abrupt slope starting and the heavy load starting cannot be realized.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model aims to provide a motorcycle clutch assembly, which solves the problems that the existing two-stage transmission motorcycle clutch assembly cannot be used for abrupt slope starting and heavy load starting.

In order to solve the technical problems, the utility model adopts the following technical scheme:

The clutch assembly of the motorcycle comprises a primary clutch transmission mechanism and a secondary clutch transmission mechanism which are arranged up and down, wherein the primary clutch transmission mechanism comprises an automatic wet clutch sleeved at the upper end of a crankshaft of an engine of the motorcycle and a first rear driven gear in transmission connection with the automatic wet clutch; the automatic wet clutch comprises a driving disc, a flyweight, a clutch upper plate, a clutch lower plate, a clutch hub and a first front stage driving gear, wherein the driving disc is sleeved on a crankshaft of an engine of the motorcycle and is in spline fit with the crankshaft, the flyweight is assembled in the driving disc, the clutch hub is provided with a clutch upper friction plate, a clutch lower plate and a release spring, the clutch upper plate is arranged between the clutch hub and the driving disc, the clutch hub is in transmission connection with the first front stage driving gear, and the first front stage driving gear is meshed with the first rear stage driven gear; when the crankshaft of the motorcycle engine rotates, the driving disc and the flyweights synchronously rotate, the flyweights drive the clutch upper plate to move towards the clutch lower plate under the action of centrifugal force, so that the clutch upper friction plate and the clutch lower friction plate are tightly pressed, and torque is sequentially transmitted to the clutch hub, the first front-stage driving gear and the first rear-stage driven gear; the middle part of the first rear driven gear is provided with an overrunning clutch and a spline housing, the outer side of the spline housing is in spline fit with the overrunning clutch, and the inner side of the spline housing is in spline fit with a main shaft of the motorcycle;

The second-stage clutch transmission mechanism comprises a second front-stage driving gear sleeved at the lower end of a crankshaft of the motorcycle engine and meshed with the second front-stage driving gear, and a shoe clutch sleeved at the lower end of a main shaft of the motorcycle; the shoe clutch comprises a second rear-stage driving disc sleeved on the main shaft and connected with the main shaft through a spline, and a second rear-stage driven gear is fixedly sleeved on the second rear-stage driving disc; the second rear driven gear is meshed with the second front driving gear, a shell with a cavity in the middle is arranged on the second rear driving disk, the shell is sleeved on the main shaft and connected with the main shaft through a spline, and a hoof block fixed with the second rear driving disk through a pin shaft is assembled in the shell.

In the clutch mechanism, an automatic wet clutch is assembled on the crankshaft, and the driving disc of the clutch is in spline fit with the crankshaft, so that the driving disc is driven to rotate together with the crankshaft when the crankshaft rotates, further the flyweights assembled in the driving disc rotate at a certain angle under the action of centrifugal force, and the flyweights are pushed to prop against the flyweights to move downwards when rotating, further the clutch upper plate, the clutch lower plate, the clutch upper friction plate and the clutch lower friction plate between the clutch upper plate and the clutch lower plate are pressed, a plurality of friction pairs are formed between the clutch upper friction plate and the clutch lower friction plate, and the effect of transmitting torque is achieved. Because the friction plate upper plate is arranged between the clutch hub and the driving disc and the clutch hub is connected with the first front-stage driving gear, the friction pair generated by the friction plate can be transmitted to the first front-stage driving gear through the clutch hub and then output to the first rear-stage driven gear meshed with the first front-stage driving gear, and the main shaft is further driven to rotate, so that torque transmission is realized. After the automatic wet clutch is used as a clutch in a primary clutch transmission mechanism, the axial force generated after extrusion is used as friction force transmission in a torque transmission mode, and the friction transmission force generated by the torque transmission mode is more stable and larger, so that the requirements of heavy load starting and steep slope starting of a motorcycle can be met. The combined rotating speed omega 1 of the driving disc and the first front-stage driving gear is smaller than the combined rotating speed omega 2 of the second-stage clutch transmission mechanism, and the transmission ratio i1 of the first front-stage driving gear and the first rear-stage driven gear of the first-stage clutch transmission mechanism is larger than the transmission ratio i1 between the second rear-stage driving hub component and the second front-stage driving gear in the second-stage clutch transmission mechanism. When the rotation speed omega 1 of the crankshaft of the motorcycle engine, the first-stage clutch transmission combination works under the action of the overrunning clutch, and the second-stage clutch idles because the combination rotation speed is not reached; when the rotation speed of the engine crankshaft is omega 2, a second front stage driving gear in the second-stage clutch transmission mechanism works in combination with a second rear stage driving hub component, and the rotation speed omega 2/i1 of the first rear stage driven gear is smaller than the rotation speed omega 2/i2 of the second rear stage driving hub component because the driving gear transmission ratio i1 of the first and second stage clutches is larger than i2. Under the action of the overrunning clutch, an automatic wet clutch of the primary clutch transmission mechanism idles, thereby achieving the purpose of automatic gear shifting. Conversely, when the crankshaft speed is reduced from ω2 to ω1, the clutch is automatically switched from the second stage operation to the first stage operation, and when the crankshaft speed ω is less than ω1, the clutch is automatically disengaged. In addition, a second-stage front-stage driving gear and a second-stage rear-stage driven gear in the second-stage clutch transmission mechanism adopted in the scheme are meshed, and the second-stage rear-stage driven gear is fixedly connected with a second-stage rear-stage driving disc. When the crankshaft is in transmission, a secondary front-stage driving gear on the crankshaft drives a secondary rear-stage driving disk to rotate, a shoe block is fixed on the secondary rear-stage driving disk through a pin shaft, and when the rotating speed of the crankshaft reaches 5000r/min (the rotating speed is adjustable), the shoe block is thrown out under the action of centrifugal force and is in contact with a shell to realize friction transmission, so that the shell is driven to rotate, and a spline sleeve is arranged in the shell to drive a main shaft to rotate. The transmission mode can enlarge the friction joint surface, the clutch is not easy to deform, the point contact area between the steel ball of the secondary transmission clutch in the traditional clutch and the upper plate is small under the action of centrifugal force, the upper plate is easy to deform to influence the friction pair, and therefore the clutch is easy to slip.

Further, the automatic wet clutch further comprises a driving gear sleeve, the driving gear sleeve is fixedly connected in the clutch center, and the driving gear sleeve is internally provided with a first front stage driving gear for matching. The drive gear housing can be used to connect the clutch hub and the first front stage drive gear to effect torque transfer.

Furthermore, the clutch hub is of a circular ring structure, the outer cylindrical surface of the clutch hub is provided with spline grooves for connecting an upper friction plate and a lower friction plate of the clutch, the inner cylindrical surface of the clutch hub is uniformly provided with slope grooves, two side walls of the slope grooves are parallel to the axis of the clutch hub, and the closed end of the slope groove is an inclined surface; the driving gear sleeve is in a ring shape, and the outer cylindrical surface of the driving gear sleeve is provided with uniformly distributed convex keys corresponding to the slope grooves of the clutch center so as to be matched with the slope grooves of the clutch center. The clutch hub and the driving gear sleeve are annular, assembly is convenient, and the inclined plane and the inclined slope groove are arranged to facilitate torque transmission between the second rear-stage driving hub component and the first front-stage driving hub component.

Further, the automatic wet clutch further comprises a clutch housing, and the clutch housing is arranged outside the driving disc and is in spline connection with the clutch upper plate. The clutch housing can form a seal against the interior assembly space after assembly with the driving disk, and simultaneously, the clutch housing can rotate with the driving disk after splined connection with the driving disk.

The clutch assembly of the motorcycle comprises a primary clutch transmission mechanism and a secondary clutch transmission mechanism which are arranged up and down, wherein the secondary clutch transmission mechanism comprises a second front-stage driving gear sleeved at the lower end of a crankshaft of an engine of the motorcycle and meshed with the primary clutch transmission mechanism, and a second rear-stage driven hub component and a second rear-stage driving hub component which are sleeved at the lower end of a main shaft of the motorcycle and arranged up and down, the second rear-stage driving hub component is meshed with the second front-stage driving gear, and the second rear-stage driven hub component is fixed with the main shaft of the motorcycle; the primary clutch transmission mechanism comprises an automatic wet clutch sleeved at the upper end of a crankshaft of the motorcycle engine and a first rear driven gear in transmission connection with the automatic wet clutch; the automatic wet clutch comprises a driving disc, a flyweight, a clutch upper plate, a clutch lower plate, a clutch hub and a first front stage driving gear, wherein the driving disc is sleeved on a crankshaft of an engine of the motorcycle and is in spline fit with the crankshaft, the flyweight is assembled in the driving disc, the clutch hub is provided with a clutch upper friction plate, a clutch lower plate and a release spring, the clutch upper plate is arranged between the clutch hub and the driving disc, the clutch hub is in transmission connection with the first front stage driving gear, and the first front stage driving gear is meshed with the first rear stage driven gear; when the crankshaft of the motorcycle engine rotates, the driving disc and the flyweights synchronously rotate, the flyweights drive the clutch upper plate to move towards the clutch lower plate under the action of centrifugal force, so that the clutch upper friction plate and the clutch lower friction plate are tightly pressed, and torque is sequentially transmitted to the clutch hub, the first front-stage driving gear and the first rear-stage driven gear; the middle part of the first rear driven gear is provided with an overrunning clutch and a spline housing, the outer side of the spline housing is in spline fit with the overrunning clutch, and the inner side of the spline housing is in spline fit with a main shaft of the motorcycle.

Drawings

FIG. 1 is a schematic cross-sectional view of a prior art motorcycle clutch assembly;

FIG. 2 is a schematic cross-sectional view of a clutch assembly for a motorcycle in accordance with embodiment 1;

Fig. 3 is a schematic cross-sectional structure of a clutch assembly of a motorcycle in embodiment 2.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance. Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined. In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Example 1

As shown in fig. 2, the motorcycle clutch assembly provided by the embodiment comprises a primary clutch transmission mechanism and a secondary clutch transmission mechanism which are arranged up and down, wherein the primary clutch transmission mechanism comprises an automatic wet clutch 2 sleeved at the upper end of a crankshaft 1 of a motorcycle engine and a first rear driven gear 4 in transmission connection with the automatic wet clutch 2; the automatic wet clutch 2 comprises a driving disc 22, a flyweight 23, a clutch upper plate 24, a clutch lower plate 25, a clutch hub 28 and a first front stage driving gear 29, wherein the driving disc 22 is sleeved on a crankshaft 1 of a motorcycle engine and is in spline fit with the crankshaft, the flyweight 23 is assembled in the driving disc 22, a clutch upper friction plate 26, a clutch lower friction plate 27, a clutch lower plate 25 and a release spring are arranged on the clutch hub 28, the clutch upper plate 24 is arranged between the clutch hub 28 and the driving disc 22, the clutch hub 28 is in transmission connection with the first front stage driving gear 29, and the first front stage driving gear 29 is meshed with the first rear stage driven gear 4; when the crankshaft 1 of the motorcycle engine rotates, the driving disc 22 and the flyweights 23 synchronously rotate, the flyweights 23 drive the clutch upper plate 24 to move towards the clutch lower plate 25 under the action of centrifugal force, so that the clutch upper friction plate 26 and the clutch lower friction plate 27 are pressed tightly, and torque is sequentially transmitted to the clutch hub 28, the first front-stage driving gear 29 and the first rear-stage driven gear 4; the middle part of the first rear driven gear 4 is provided with an overrunning clutch and a spline housing, the outer side of the spline housing is in spline fit with the overrunning clutch, and the inner side of the spline housing is in spline fit with the main shaft 3 of the motorcycle; the secondary clutch transmission mechanism comprises a second front-stage driving gear 6 sleeved at the lower end of the crankshaft 1 of the motorcycle engine and meshed with the second front-stage driving gear, and a shoe clutch sleeved at the lower end of the main shaft of the motorcycle; the shoe clutch comprises a second rear-stage driving disc 10 which is sleeved on the main shaft 1 of the motorcycle and is in spline connection with the main shaft of the motorcycle, and a second rear-stage driven gear 9 is fixedly sleeved on the second rear-stage driving disc 10; the second rear driven gear 9 is meshed with the second front driving gear 6, a shell 12 with a cavity in the middle is arranged on the second rear driving disc 10, the shell 12 is sleeved on a main shaft of the motorcycle and is connected with the main shaft of the motorcycle through a spline, and a hoof block 11 fixed with the second rear driving disc 10 through a pin shaft is arranged in the shell 12.

After the automatic wet clutch 2 is used as a clutch in a primary clutch transmission mechanism, the torque transmission mode is to transmit the axial force generated after extrusion as friction force, and the friction transmission force generated by the torque transmission mode is more stable and larger, so that the requirements of heavy load starting and steep slope starting of the motorcycle can be met. The combined rotation speed omega 1 of the driving disc 22 and the first front-stage driving gear 29 is smaller than the combined rotation speed omega 2 of the second-stage clutch transmission mechanism, and the transmission ratio i1 of the first front-stage driving gear 29 and the first rear-stage driven gear 4 of the first-stage clutch transmission mechanism is larger than the transmission ratio i1 between the second rear-stage driving hub component 7 and the second front-stage driving gear 6 in the second-stage clutch transmission mechanism. When the rotating speed omega 1 of the crankshaft 1 of the motorcycle engine, the first-stage clutch transmission combination works under the action of the overrunning clutch, and the second-stage clutch idles because the combined rotating speed is not reached; when the rotation speed of the engine crankshaft is omega 2, the second front stage driving gear 6 in the secondary clutch transmission mechanism works in combination with the second rear stage driving hub component 7, and the rotation speed omega 2/i1 of the first rear stage driven gear 4 is smaller than the rotation speed omega 2/i2 of the second rear stage driving hub component 7 because the driving gear transmission ratio i1 of the first and second stage clutches is larger than i2. Under the action of the overrunning clutch, the automatic wet clutch 2 of the primary clutch transmission mechanism idles, thereby achieving the purpose of automatic gear shifting. Conversely, when the crankshaft speed is reduced from ω2 to ω1, the clutch is automatically switched from the second stage operation to the first stage operation, and when the crankshaft speed ω is less than ω1, the clutch is automatically disengaged. The driving gear of the second stage front stage in the adopted second stage clutch transmission mechanism is meshed with the driven gear of the second stage rear stage, and the driven gear of the second stage rear stage is fixedly connected with the driving disc of the second stage rear stage. When the crankshaft is in transmission, a secondary front-stage driving gear on the crankshaft drives a secondary rear-stage driving disk to rotate, a shoe block is fixed on the secondary rear-stage driving disk through a pin shaft, and when the rotating speed of the crankshaft reaches 5000r/min (the rotating speed is adjustable), the shoe block is thrown out under the action of centrifugal force and is in contact with a shell to realize friction transmission, so that the shell is driven to rotate, and a spline sleeve is arranged in the shell to drive a main shaft to rotate. The transmission mode can enlarge the friction joint surface, the clutch is not easy to deform, the point contact area between the steel ball of the secondary transmission clutch in the traditional clutch and the upper plate is small under the action of centrifugal force, the upper plate is easy to deform to influence the friction pair, and therefore the clutch is easy to slip.

Further, the automatic wet clutch 2 further comprises a driving gear sleeve 21, the driving gear sleeve 21 is fixedly connected in the clutch hub 28, and a first front stage driving gear 29 is arranged in the driving gear sleeve 21 for matching with the first front stage driving gear. The drive gear housing 21 can be used to connect the clutch hub 28 and the first front stage drive gear 29 for torque transfer. In addition, the automatic wet clutch 2 in this embodiment further includes a centering sleeve assembly, the centering sleeve assembly includes a centering sleeve and a sleeve, the upper clutch friction plate 26 and the lower clutch friction plate 27 are assembled on the centering sleeve, the centering sleeve is assembled on the sleeve, and the upper clutch friction plate 26 is matched with the external teeth on the centering sleeve through the internal teeth to transmit power.

Further, the clutch hub 28 is of a circular ring structure as a whole, the outer cylindrical surface of the clutch hub is provided with spline grooves for connecting the clutch upper friction plate 26 and the clutch lower friction plate 27, the inner cylindrical surface of the clutch hub is uniformly provided with slope grooves, two side walls of the slope grooves are parallel to the axis of the clutch hub 28, and the closed end of the slope groove is an inclined surface; the driving gear sleeve 21 is in a ring shape, and the outer cylindrical surface is provided with uniformly distributed convex keys corresponding to the slope grooves of the clutch hub 28 so as to be matched with the slope grooves of the clutch hub 28. The clutch hub 28 and the driving gear sleeve 21 are both annular, so that the assembly is convenient, and the inclined planes and the inclined slope grooves are arranged to facilitate torque transmission between the second rear-stage driving hub part 7 and the first front-stage driving hub part.

Further, the automatic wet clutch 2 further includes a clutch housing disposed outside the driving disk 22 and spline-connected with the clutch upper plate 24. The clutch housing can form a seal against the interior assembly space after assembly with the driving disk 22, and can rotate with the driving disk 22 after splined connection with the driving disk 22.

Example 2

As shown in fig. 3, the motorcycle clutch assembly provided in this embodiment includes a primary clutch transmission mechanism and a secondary clutch transmission mechanism which are disposed up and down, the secondary clutch transmission mechanism includes a second front driving gear 6 which is sleeved at the lower end of a crankshaft 1 of a motorcycle engine and is engaged with the same, and a second rear driven hub component 8 and a second rear driving hub component 7 which are sleeved at the lower end of a main shaft 3 of the motorcycle and are disposed up and down, the second rear driving hub component 7 is engaged with the second front driving gear 6, and the second rear driven hub component 8 is fixed with the main shaft 3 of the motorcycle; the primary clutch transmission mechanism comprises an automatic wet clutch 2 sleeved at the upper end of a crankshaft 1 of the motorcycle engine and a first rear driven gear 4 in transmission connection with the automatic wet clutch 2; the automatic wet clutch 2 comprises a driving disc 22, a flyweight 23, a clutch upper plate 24, a clutch lower plate 25, a clutch hub 28 and a first front stage driving gear 29, wherein the driving disc 22 is sleeved on a crankshaft 1 of a motorcycle engine and is in spline fit with the crankshaft, the flyweight 23 is assembled in the driving disc 22, a clutch upper friction plate 26, a clutch lower friction plate 27, a clutch lower plate 25 and a release spring are arranged on the clutch hub 28, the clutch upper plate 24 is arranged between the clutch hub 28 and the driving disc 22, the clutch hub 28 is in transmission connection with the first front stage driving gear 29, and the first front stage driving gear 29 is meshed with the first rear stage driven gear 4; when the crankshaft 1 of the motorcycle engine rotates, the driving disc 22 and the flyweights 23 synchronously rotate, the flyweights 23 drive the clutch upper plate 24 to move towards the clutch lower plate 25 under the action of centrifugal force, so that the clutch upper friction plate 26 and the clutch lower friction plate 27 are pressed tightly, and torque is sequentially transmitted to the clutch hub 28, the first front-stage driving gear 29 and the first rear-stage driven gear 4; the middle part of the first rear driven gear 4 is provided with an overrunning clutch and a spline housing, the outer side of the spline housing is in spline fit with the overrunning clutch, and the inner side of the spline housing is in spline fit with the main shaft 3 of the motorcycle.

In the clutch mechanism, an automatic wet clutch 2 is assembled on a crankshaft, a driving disc 22 of the clutch is matched with the crankshaft through a spline, when the crankshaft rotates, the driving disc 22 is driven to rotate together with the crankshaft, so that a flyweight 23 assembled in the driving disc 22 rotates at a certain angle under the action of centrifugal force, and a clutch upper plate 24 abutted against the flyweight 23 is pushed to move downwards during rotation, so that the clutch upper plate 24, a clutch lower plate 25, a clutch upper friction plate 26 and a clutch lower friction plate 27 which are positioned between the clutch upper plate 24 and the clutch lower plate 25 are pressed tightly, and a plurality of friction pairs are formed between the clutch upper friction plate 26 and the clutch lower friction plate 27 to play a role of transmitting torque. Because the friction plate upper plate is arranged between the clutch hub 28 and the driving disc 22, and the clutch hub 28 is connected with the first front-stage driving gear 29, the friction pair generated by the friction plate can be transmitted to the first front-stage driving gear 29 through the clutch hub 28 and then output to the first rear-stage driven gear meshed with the first front-stage driving gear 29, and the main shaft is further driven to rotate, so that torque transmission is realized.

The automatic wet clutch 2 in this embodiment may be a wet multi-plate clutch or a two-stage wet friction plate clutch, such as the clutch disclosed in chinese patent application 2014200304943.

Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the technical solution, and those skilled in the art should understand that modifications and equivalents may be made to the technical solution of the present utility model without departing from the spirit and scope of the present utility model, and all such modifications and equivalents are included in the scope of the claims.

Claims

1. A clutch assembly of a motorcycle comprises a primary clutch transmission mechanism and a secondary clutch transmission mechanism which are arranged up and down; the first-stage clutch transmission mechanism is characterized by comprising an automatic wet clutch sleeved at the upper end of a crankshaft of the motorcycle engine and a first rear-stage driven gear in transmission connection with the automatic wet clutch; the automatic wet clutch comprises a driving disc, a flyweight, a clutch upper plate, a clutch lower plate, a clutch hub and a first front stage driving gear, wherein the driving disc is sleeved on a crankshaft of an engine of the motorcycle and is in spline fit with the crankshaft, the flyweight is assembled in the driving disc, the clutch hub is provided with a clutch upper friction plate, a clutch lower plate and a release spring, the clutch upper plate is arranged between the clutch hub and the driving disc, the clutch hub is in transmission connection with the first front stage driving gear, and the first front stage driving gear is meshed with the first rear stage driven gear; an overrunning clutch is arranged in the middle of the first rear-stage driven gear and is in spline fit with a main shaft of the motorcycle through a spline housing; when the crankshaft of the motorcycle engine rotates, the driving disc and the flyweights synchronously rotate, the flyweights drive the clutch upper plate to move towards the clutch lower plate under the action of centrifugal force, so that the clutch upper friction plate and the clutch lower friction plate are tightly pressed, and torque is sequentially transmitted to the clutch hub, the first front-stage driving gear and the first rear-stage driven gear;

the second-stage clutch transmission mechanism comprises a second front-stage driving gear sleeved at the lower end of a crankshaft of the motorcycle engine and meshed with the crankshaft, and a shoe clutch sleeved at the lower end of a main shaft of the motorcycle, wherein the shoe clutch comprises a second rear-stage driving disk sleeved on the main shaft and connected with the main shaft through a spline, and a second rear-stage driven gear is fixedly sleeved on the second rear-stage driving disk in a sleeved mode; the second rear driven gear is meshed with the second front driving gear, a shell with a cavity in the middle is arranged on the second rear driving disk, the shell is sleeved on the main shaft and connected with the main shaft through a spline, and a hoof block fixed with the second rear driving disk through a pin shaft is assembled in the shell.

2. The motorcycle clutch assembly of claim 1, wherein the automatic wet clutch further comprises a drive gear housing fixedly secured within the clutch hub, the drive gear housing having a first front stage drive gear disposed therein for mating with the first front stage drive gear.

3. The motorcycle clutch assembly according to claim 2, wherein the clutch hub is of a circular ring structure as a whole, the outer cylindrical surface of the clutch hub is provided with spline grooves for connecting the upper friction plate and the lower friction plate of the clutch, the inner cylindrical surface of the clutch hub is uniformly provided with ramp grooves, two side walls of the ramp grooves are parallel to the axis of the clutch hub, and the closed end of the ramp grooves is an inclined surface; the driving gear sleeve is in a ring shape, and the outer cylindrical surface of the driving gear sleeve is provided with uniformly distributed convex keys corresponding to the slope grooves of the clutch center so as to be matched with the slope grooves of the clutch center.

4. The motorcycle clutch assembly of claim 2, wherein the automatic wet clutch further comprises a clutch housing disposed externally of the driving disk and splined to the clutch upper plate.

5. A motorcycle clutch assembly as claimed in claim 1 or 2 or 3 or 4 wherein the secondary clutch transmission is further configured to: the second-stage clutch transmission mechanism comprises a second front-stage driving gear sleeved at the lower end of a crankshaft of the motorcycle engine and meshed with the crankshaft, and a second rear-stage driven hub part and a second rear-stage driving hub part which are sleeved at the lower end of a main shaft of the motorcycle and are arranged up and down, wherein the second rear-stage driving hub part is meshed with the second front-stage driving gear, and the second rear-stage driven hub part is fixed with the main shaft of the motorcycle.